H03F 3/45278
Using bifet transistors as the active amplifying circuit
Official title: {using BiFET transistors as the active amplifying circuit}
H03F3/45278 (Using bifet transistors as the active amplifying circuit) appears on 176 US grants and 111 published applications in this corpus.
Search patents in H03F- Granted patents
- 176
- Published applications
- 111
- Assignees
- 93
- Inventors
- 279
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 1 |
| 2002 | 2 | 2 |
| 2003 | 9 | 5 |
| 2004 | 6 | 2 |
| 2005 | 3 | 5 |
| 2006 | 5 | 9 |
| 2007 | 5 | 11 |
| 2008 | 8 | 6 |
| 2009 | 9 | 3 |
| 2010 | 7 | 8 |
| 2011 | 4 | 2 |
| 2012 | 7 | 1 |
| 2013 | 3 | 4 |
| 2014 | 2 | 2 |
| 2015 | 3 | 3 |
| 2016 | 4 | 3 |
| 2017 | 3 | 4 |
| 2018 | 5 | 4 |
| 2019 | 5 | 8 |
| 2020 | 7 | 3 |
| 2021 | 2 | 4 |
| 2022 | 5 | 2 |
| 2023 | 1 | 6 |
| 2024 | 3 | 6 |
| 2025 | 3 | 2 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03F 3/45282Long tailed pairs103
- H03F 3/45295Pl types16
- H03F 3/45367Complementary non-cross coupled types7
- H03F 3/45309Complementary long tailed pairs having parallel inputs and being supplied in parallel4
- H03F 3/45372Mirror types4
- H03F 3/45336Complementary long tailed pairs having parallel inputs and being supplied in series2
- H03F 3/45363Complementary cross coupled types2
- H03F 3/45349Complementary pl types having parallel inputs and being supplied in series1
All 9 subgroupsShow fewer
Recent patents
- Instrumentation amplifier with base current compensator for improved performance11 Aug 2026US 12,706,573 B2Texas Instruments Incorporated
- Differential amplifier and method for enhancing gain of a differential amplifier6 Jan 2026US 12,519,439 B2Imec Vzw
- Amplifier output stage circuitry2 Dec 2025US 12,489,405 B2Texas Instruments Incorporated
- Amplifier having transconductance attenuation2 Sep 2025US 12,405,623 B2Texas Instruments Incorporated
- Differential amplifier compensation1 Jul 2025US 12,348,195 B2Texas Instruments Incorporated
- Voltage/current conversion device and current source device23 Jul 2026US 2026/0211438 A1Thine Electronics, Inc.
- Feedback amplifier input stage circuit2 Jul 2026US 2026/0189197 A1Harman International Industries, Incorporated
- Rf amplifier and rf receiver having the same18 Jun 2026US 2026/0171982 A1Electronics and Telecommunications Research Institute
- Amplifier equalizer multi-tone peak adaptation4 Jun 2026US 2026/0155789 A1MACOM Technology Solutions Holdings, Inc.
- Analog processing of signed weights in activation functions23 Apr 2026US 2026/0113009 A1Micron Technology, Inc.
Most cited
By later US patents
- Subthreshold CMOS amplifier with wide input voltage range126US 5,095,284 ASynaptics Incorporated · 1992
- Circuit and method for compensating for offset voltage52US 7,227,389 B2Samsung Electro-Mechanics Co., Ltd. · 2007
- Balanced differential amplifier having common mode feedback with kick-start47US 6,265,941 B1Agere Systems Guardian Corp. · 2001
- Voltage-to-current converter32US 4,675,594 AHoneywell Inc. · 1987
- High speed fully differential operational amplifier with fast settling time for switched capacitor applications32US 5,847,607 ANational Semiconductor Corporation · 1998